Everytime I would go shoot, it would fly off.  Thank God it has only fallen in snow.  If it got scratched I might cry.  I started layering electrical tape inside to get a tighter fit.  It took three rounds of tape to keep me from digging in the snow.  I called surefire to make sure I had the right one and they said I did.  I felt like an ass when my rediculously expensive tacticool light cover kept taking a dive.  Surefire ad says (cam-locking lever keeps filter securely attatched to light.)  It should say (Some electrical tape required):  Works great now.  Just wondering if I'm the only one.  Too bad it's not flying off in the picture.  How do you post the actual picture rather than the link?  
http://img219.imageshack.us/img219/23/gun007small0tg.jpg

I'm having trouble posting the picture correctly.  Bare with me.
http://img219.imageshack.us/img219/23/gun007small0tg.jpg